USB Flash Drive Comparison

So, I’ve amassed a nice collection of USB drives and I’ve reviewed most all of them at one time or another but I’ve never compared them all to each to to find out which one is really the best overall.

Taking stock I’ve got 21 of them that are over 1gig going up to 64gb, and I’ve got others that are below one gig that just hang around in my drawer as they are sort of useless at this point in time. I’ve had more, but I’ve given them away as who really needs all of those drives, but I’ve stopped giving them away as I wanted to compare them altogether to see which is the best, and I figured that the end of the year would be the perfect time to do it.

So I’ve got 21 USB drives ranging from 1gig to 64gigs in capacity from companies like Super Talent, OCZ, Patriot, Swiss Memory, Corsair, ATP and a few others throw in for good measure. I’m only testing 1+ gig drives as I feel that below that they’re rather useless at this point in time.

I’ve been testing these drives for quite some time to create a comparison chart to see which is the best, I was doing this for an article, but also to satisfy my own curiosity as well to see just which one is the best.

So read on to see which drive is the best of the best in terms of performance in both read and write testing.
Here’s the drives all nicely organized to see:
DSCF1770
As I mentioned there are 21 of them in total from various companies, I’ll list them by size in descending order for you:

Patriot Magnum 64gb
Super Talent Pico-C Gold 8gb
Super Talent Pico-D
ATP EarthDrive 8gb
ATP ToughDrive Camo 8gb
Corsair Flash Voyager Mini 8gb
OCZ Rally2 Turbo 4gb
OCZ ATV Turbo 4gb
Super Talent 200X 4GB
Corsair Flash Voyager Mini 4gb
Lexar Solo Vault 4gb
Sandisk Cruzer Enterprise 2gb
IronKey 2gb
Samsung 2gb
Generic Wood 2gb
Swiss Memory Swissbit 2gb
Sony MicroVault 1gb
ATP Petito 1gb
NTegrity 1gb
Ridata Yego 1gb
ATP ToughDrive 1gb

All testing was done on my main system with C2Q 6600 CPU and EVGA NF680i motherboard, it was done using a direct USB connection, no hubs involved.

System was only running basic processes at the time and nothing, I also ran the Process Idle Tasks command to make sure system wouldn’t interfere with testing, each drive was also removed and re-inserted between tests, my hard disks were degfragged prior to testing as well.

All test were performed three times and then averaged out to get all of the results shown.

All of the graphs can be clicked to show a larger view.

First up for testing I used SiSoft Sandra 2009 Removable Storage Benchmark.

Here’s a copy of exactly what this test does, how it works and how to understand it:

The typical usage model for these devices is file operations, such as writing a file to the device, reading a file from it, and deleting a file, this benchmark exercises the devices in terms of these operations.

The following characteristics are measured for each of the four representative files sizes of 512 Bytes (representing a minimal single data cluster file), 32kB, 256kB, 2MB and 64MB. The weighting of the results is not equal it represents the distribution of different files sizes as used on these devices (obtained through field research):

Read Performance: expressed both in terms of Operations per Minute (i.e. the number of files read per minute) and the corresponding net transfer rate in kB/second.

Write Performance: similarly expressed both in terms of Operations per Minute (i.e. the number of files written in a minute) and the corresponding net transfer rate in Kbytes/second.


Delete Performance: measuring the number of files deleted per minute.

For each of the four file sizes a Combined Index is then calculated, stating the combined performance in terms of Combined Operations Per Second, with respect to a mix of write, read and delete operations.

Combined Device Index: is a composite figure representing an overall performance rating based on the average of the Combined Index figures over the four file sizes. (Higher is better, i.e. better performance)

Endurance Factor: is a figure representing the Wear and Life Expectancy of flash devices; this is obtained by dividing the average performance (normal condition, i.e. sequential write) to the lowest performance (high-stress condition, i.e. same block re-write).

It measures the relative improvement of endurance caused by the wear levelling or flash management algorithm; the absolute endurance of a device (i.e. its expected life-time) is directly dependent, in addition to this Endurance Factor, on the nominal manufacturer rating of maximum erase/reprogram cycles, which is typically 100,000+ for SLC and 10,000+ for MLC devices. (Higher is better, i.e. longer life-time for the device)



First graph is the overall score showing Combined Index and Endurance Factor of the drives, I’ve organized them from best to worst to make it easier to read.


sandra graph

next up is looking at the 256MB Files Test inside the Removable Storage Benchmark, again best to worst.

As we can plainly see OCZ, Super Talent and Lexar and SanDisk lead the pack easily.

Taken from above:

Read Performance: expressed both in terms of Operations per Minute (i.e. the number of files read per minute)

Write Performance: similarly expressed both in terms of Operations per Minute (i.e. the number of files written in a minute)



sandra graph2

now looking closer here we see SanDisk drop from the top four spot due to slower write performance than the others.

Next up for testing I’m using DiskBench from NodeSoft, and it’s actually one of my favorite tests for USB drives as it gives us the actual time taken to perform an action, and I think actual time is a much better way of understanding it for a lot of people.

DiskBench gives us not only times, but the actual bandwidth or transfer rates in MB/s, so we’ll look at the time charts first.

I’ve run three tests to give a good example of real world usage, Copy From the USB drive to my main disk, Copy To or write a file from my main disk to the USB drive and Read From the USB drive as some people read files from them.

For all testing the same exact file was used, it is a 350mb .AVI video file.

First up is a graph with no labeling on it, it was very cramped with the labels so I separated things to make it easier to understand, think of this graph as just an overview, I used Write speeds to organize the chart from fastest to slowest.


diskbench times all no labels

I’ve created three more graphs, I only colored the one we are looking at, but left the others in, only white with black outline for some.

First up is Time to Copy from the USB drive to my hard disk, arranged from fastest to slowest, results are shown in seconds:


diskbench copy from

Similar results from the SiSoft testing, but here we see the 64gb Patriot Exporter fairs well.

Next up is the Copy To the USB drive from my hard disk, or time to write the file to the USB drive, again fastest to slowest:



diskbench copy to time

Here we are back to results that look very similar to what we saw while using SiSoft Sandra 2009 test, with the Super Talent, Lexar and OCZ drives leading.

Finally for the time trials we have the Time to Read the file from the USB drive, the example would be watching a movie from the USB drive, obviously faster would be better, producing a smoother playback for you. Again here the results are ordered Fastest to Slowest:
[img]http://www.testfreaks.com/blog/wp-content/uploads/2008/12/windowslivewriterusbflashdrivecomparison21testedandcompar-11cdediskbench-read-from-thumb.jpg[img]

diskbench read from

Here we see the results changed quite a bit, with ATP, OCZ, Patriot and Super Talent taking the lead, but as with Super Talent, a different drive performs better.

Now, as I mentioned DiskBench gives us times and transfer rates, so we’ll look at the transfer rates for those times now, so we have four more graphs to look at, ordered and sorted the same way.

First up is the unlabeled overall graph using Write speeds to arranged the chart from Fastest to Slowest:

diskbench xfer rates no labels

Now, we’ll look at the results individually, labeled with the speed in MB/s.

First is Copy From the USB drives, again fastest to slowest:

diskbench copy from XFER rates

Here we see the transfer speed of the Exporter leads the pack, but if we look back at the charts we see the Exporter came in second actually below the Super Talent drive for the actual Time to Copy From from drive. I’m guessing the time lag has something to do with how the drive reads or transfers to lead to the time discrepancy.

Next we have the transfer rates to Copy To, or Write the file to the drive:

diskbench copy to XFER rates

Again it’s back to the familiar ordering of the drives, with the OCZ, Super Talent and Lexar drives coming in first four with about the same transfer speeds.
Now finally we’ve got the Read rates:

diskbench read from XFER rates
here we see why the ATP ToughDrive Camo did so well on the Read Test, it’s got excellent speeds, it’s well ahead of the others in Read performance.

I do have one final graph for you though, I was curious if there was some sort of pattern in relation to performance and size so I created another DiskBench graph (Transfer Times) with the sizes of the drives in descending order:

diskbench times sizes

We can see from this graph that there is a sweet spot at the 4gb capacity level, with a surprise coming from the 64gb Patriot Exporter, and the 1gb ATP ToughDrive, and the SandDisk Cruzer isn’t too bad either, but as we can see the 4gb technology is where the overall good performance lies right now.

Well I learned that it’s very time consuming to do this sort of thing, and I think I may have too many USB drives floating around right now… but I also learned there is no clear winner overall.

I did this to not only satisfy my curiosity but maybe provide a sort of database comparison for users looking to learn more about how a drive performs is a few key areas. Not everyone will use a USB drive the same way, some people might be concerned about Write speeds while someone else might be concerned about the time to Copy data from the drive.

I’s like to continue adding to this comparison as more drives comes in and hopefully build up a large database comparing the USB drives on the market.

That being said, if you’re looking for sheer capacity, obviously the Patriot Magnum Exporter 64gb USB drive fits your needs, and it also offers fairly decent performance as well, but it’s expensive and I’m not sure there’s need for that much storage right now.

The 8gig and 4gig drives are more common models that I’m sure most people have handy and use most often. Looking at those results we can see OCZ, Lexar, Sandisk and Super Talent would be the choices to go with as they offer the best overall performance. From those, one would have to make a choice about what is most important to them, Write speeds or Read speeds, and even then they’re very similar in performance overall.

Personally I use the OCZ Rally2Turbo myself for transferring stuff between computers most often if need be, it’s usually large enough for the job and I also carry the Ironkey on my keychain so it’s with me at all times, but it’s got other security features and built in software that make it much more useful than an ordinary USB drive.

Well that’s that, I hope you learned something from all of my testing, and I’ll hopefully update these charts as new drives come in. You can also check out our selection of USB Memory on the main site